Machine foe collecting dust



(N0 MOGL) 3 Sheets-Sheert. 1`

A. H. KIRK.

MACHINE FCR COLLECTING DUST.

No. 259,873. C Patentedanne'zo, 1882..,

i 1 Em/donf Z @fw/@7% (No Model.) s sheets-sheet 2.

' A. H. KIRK.v

.MAGHINE FR COLLECTING DUST.

No.259,8'73. I. PatentedJunez20,l882l.

Ucs: A

N. PETERS. Phuwmhagrapher. washington D. C.

3 Sheets-#Sheet 3.

(No Model.)

A H. KIRK:

MACHINE PCR COLLECTING DUST.

f N0.259,87C. Patented Junezo, 1882.,

f d MM/M' 2 UNITED STATES PATENT OFFICE. I-

ALVA H. KIRK, OF MINNEAPOLIS, MINNESOTA, ASSIGNORTO KIRK FENDER, OF SAMEPLACE.

g MACHINE FOR COLLECTING DUST.

SPECIFICATION forming part 'of Letters Patent No. 259,873, dated June20, 1882.

Application tiled February 28, 1882. (No model.)

of the United States, residing at Minneapolis,

in the county of Hennepin and State of Minnesota, have invented certainnew and useful Improvementsin Machines for Oollectin gDust and Idohereby declare the followingto beafull, clear, and exact descriptionof the invention,

such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanyin gdrawings, and to the letters or figures of reference marked thereon,which form a part of this speciication.

The object of this invention is to improve machines for catching dust inouring-mills, and especially the invention described iny my applicationled in the United States Patent Office January 31,1882; and it consistsin the change in the construction of solne of the actuating parts shownin that application, and in means applied to the machine to insuresafety against explosions.

In the drawings, Figure l represents a side view of the machine with aportion of the cas- `ing removed to show the interior. Fig. 2 is a viewon line wx, Fig. 1, partly in plan and partly in section. Fig. 3 is ahalf transverse sectional view ot' same. Fig. 4 is a broken side View,in part section, of the dust-boxes, their relative situation. upon theendless chain, and their operating devices. Fig. 5 represents enlargedparts of the dust-boxes, the sprocketchain, and the method of securingthe parts of the dustboXes to the links of the chain.

A represents the supporting-frame of the machine.

A represents a frame attached to the supporting-fran1e A, and takes theplace of the ordinary casing of the machine, and has tine Wire-gauze aentirely coverbin'g its outer face, While its inner face is covered withfine cloth a. The purpose of the wire-gauze is to prevent 5o making itcomparativelysafe from explosions,

even'if the line oating dust outside the machine should become ignited.This protection may only be applied to the door or side that is openedto see the inside oi the machine and its operation.

B is the driving-pulley on the axle b, that is fast to or cast uponplates jj, which are fast to the side of the machine.

Pinion B may be cast upon pulley B. This pinion gears .with two toothedwheels, iandf, causing both to continually revolve with the pulley B.Wheel f has a segmental gear, e', cast on its side, `whichrevolves withthe Wheel f. Wheel gives revolution to wings i', which form an automaticdischarge for the dust from the dust-box into a still-air chamber below.

E E are transverse shafts, which have bearings in the sides of themachine and reach across thewidtn of the same, and have securelyattached thereto at each end, within the case, sprocket or star wheels ee" e" e", over which go endless chain belts 6".

Fast upon shaftE is atoothed wheel, c, that revolves with shaft E, andis located outside of the case, the teeth ot' which gear with thepartially-teothed or segmental wheel e', and as y this wheel c has butone-quarter of its circumference toothed. it will revolve wheel e but aquarter-revolution, when said wheel e will rest, While the whcelsf and econtinue to revolve, and in doing so the teeth of wheel e will againengage with the teeth on wheel e and give it anotherquarter-revolutionand an intermittin g motion to wheel e, shaft E, chain e", and to thedust-box.

Upon the outside of Wheel e is cast a ratchet- Wheel, h, which, inconnection with its pawl h', will hold the wheel e from a backwardmovement after the teeth e have passed out of gear with the teeth onwheel e, and so that Wheel e will be in position to gear with the teethc when wheelf brings them to the proper point IOO made of staves orpieces g, beveled in such manner that the pieces will pass around thewheels c on chains 0" easily, and when od the wheels, or in a straightline and on guideways g', will be dust-tight 011 the bottom and ends.Two of these dust-boxes are employed and attached to the chain in suchmanner that when one advances to turn over the sprocketwheels at one endof the machine the other will be rising over the sprocket-wheels at theother end. These boxes are made to be dusttight in the raceway in whichthey travel.

H H are a series of dust-catching bags or corrugations of cloth, open attheir bottom ends, k, the cloth of which is attached to frames in theusual way, and their tops or narrow parts arc attached to cap-pieces Lnear the top of themachine, which pieces are suspended at each endwithin the machine by coiled springs I, attached to brackets l', so asto allow the cap-pieces to be pulled down a certain distance, and whenthe force that does so ceases the springs will with a quick motionreturn the cap-pieces and dust-bags to their original positions.

O is a bell-crank lever, pivoted at or near its center to bracket orsupport 0. At the outer end of the upper arm of crank-lever, O, areholes to attach cords or wires p to, which cords or wires extend upwarddiagonally and are attached to adj ustablc eyebolts p', which go throughcap-pieces L and are adjusted on the tops by holding-screws p in sleeves72". rlhe trip or lower arm, o', of' the bell-crank lever O projectsdownward at an inclination, so that when the front side of the dust-boxG, in its forward movement, strikes it, the trip o will be raised,causing a depression ot the upper arm, to which the cords are attached,and as it turns down the cords force the cap-pieces L and the bags downagainst the force ot' the springs, and as the dust-box moves on, and thetrip leaves the front side ot' the dust-box, and the box stops itsmotion, the springs l are free to resume their normal position and bringthe bags back with a quick jerk, shaking all the adhering dust o'. Atthis particular time the dust-box, being still and under the mouth I ofthe bag, receives the dust so shaken off, and by the time this happensthe wheelf, with its broken gear c', is in gear with wheel c andrevolves the wheel c on shaft E one quarterrevolution, causing theendless chain belt c, with the dust-box G, to travel the distance fromthe mouth of one dust-bag or corrugation to the next, to be operatedupon and cleared of its dust thathas been forced therein through theusual way into chamber P, underneath the dust-catching bags H. Thedust-box G may be caused to travel slow in one direction under thedust-catching bags,withoutintermitting,if desired, by only the change ofgear.

The device as above constructed and operated can be used within the caseof a middlings-purilier, thus saving the entire frame and casing when soused.

Having thus described my invention, what I desire to claim, and secu reby Letters Patent, 1s-

l. ln a machine for collecting dust, the combination of the frame A, thcframe Af, having the wire-gauze a on its outside and the cloth a. uponthe inside, with devices inclosed within for catching and separatingdust from the air, substantially as described.

2. In amachine for collecting dust, the dustbox Gr and means for causingit to travel ntermittingly underneath the dust-collecting cloth, incombination with the pivoted lever O, having trip-arm o', cords 11, andthe compressible dust-arresting bags H, constructed to operatesubstantially as described.

3. The combination, in a machine for separating dust from the air, offrames covered with gauze upon the outside and cloth 0n the inside, adust-catching box having an intermitting movement and mechanism forgiving such motion, compressible dust-catching bags, and mechanism forcausing the compression, substantially as described.

In testimony whereoflaftx my signature in presence ot' two witnesses.

ALVA H. KIRK.

Witnesses:

J. GUILFORD, WILLIAM W. MARR.

